紫電一閃 しでんいっせん Meanings Noun, Adverb flash of lightning; flash of a sword; brandishing a sword Kanji 紫 purple. Read as シ. 電 electric. Read as デン. 一 one. Read as イチ. 閃 flash; brandish. Read as セン. Word lists Yojijukugo (四字熟語) Jinuma: Japanese Dictionary · Word lists